Baikal Deep Underwater Neutrino Telescope

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Since 1993, neutrino research has been conducted at the Baikal Deep Underwater Neutrino Telescope (BDUNT) which is located 1.1 km below the surface of Lake Baikal.[1]

The first part of NT-200, the detector NT-36 with 36 optical modules (OMs) at 3 short strings, was put into operation and took data up to March 1995.[2] A 72-OMs array, NT-72, run in 1995–1996. In 1996, it was replaced by the four-string array NT-96.[3] Over its 700 days effective lifetime, 320,000,000 muon events were collected with NT-36, NT-72, and NT-96. Due to its design, BDUNT picks up a lot of atmospheric neutrinos created by solar winds interacting with the atmosphere — as opposed to cosmic neutrinos which can give clues to cosmic events and are therefore of greater interest to physicists.

Beginning 6 April 1997, NT-144, a six-string array with 144 OMs, took data in Lake Baikal. NT-200 array was completed in April 1998. The Baikal Neutrino Telescope NT-200 is being deployed in Lake Baikal, 3.6 kilometers (2.2 mi) from shore at a depth of 1.1 kilometers (0.68 mi). It consists of 192 optical modules (OMs).[4]

In 2004-2005 it was updated to NT-200+ with three additional strings around NT-200 at distance of 100 meters, each with 12 modules.[5][6]

There are plans to build 1 cubic km telescope NT-1000 in Baikal.[7]


  1. ^ "Icy life working with Russia's underwater 'cosmic eye'". BBC News. 24 September 2010. Retrieved 2011-02-18. 
  2. ^ Belolaptikov, I.A. "Results from the Baikal Underwater Telescope". Nuclear Physics B (Proc. Suppl.) (43 (1995)): 241–244. 
  3. ^ Belolaptikov, I. A., Bezrukov, L. B., Borisovets, B. A., Budnev, N. M., Bugaev, E. V., Chensky, A. G., ... & Pokhil, P. G. (1997). The Baikal underwater neutrino telescope: Design, performance, and first results. Astroparticle Physics, 7(3), 263-282. doi:10.1016/S0927-6505(97)00022-4; scanned version from CERN Preprints
  4. ^ "Baikal Lake Neutrino Telescope". Baikalweb. 6 January 2005. Retrieved 2008-07-30. 
  5. ^ Wischnewski, R, The Baikal neutrino experiment: from NT200 to NT200+, 27 Sep 2006 (presented at 2nd Workshop on Very Large Volume Neutrino Telescopes (VLVNT2), Catania, Italy, 8.-11. November 2005)
  6. ^ WISCHNEWSKI, RALF. "THE BAIKAL NEUTRINO TELESCOPE – RESULTS AND PLANS". International Journal of Modern Physics A (arXiv:astro-ph/0507698). 
  7. ^ A. V. Avrorin, An Experimental String of the NT1000 Baikal Neutrino Telescope // ISSN 00204412, Instruments and Experimental Techniques, 2011, Vol. 54, No. 5, pp. 649–659. (Pleiades Publishing, Ltd.)